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Non-invasive brain stimulation (NIBS) intervention

PJ Pimthong Jitsakulchaidej
PW Pakorn Wivatvongvana
KK Kittipong Kitisak
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Transcranial magnetic stimulation (TMS). The MagPro® R30 with Option is manufactured by MagVenture® A/S Lucernemarken, 15 DK-3520, Farum, Denmark.

We used the MMC-140-II Parabolic Coil with power control as provided by Magventure. The coil has a parabolic shape, which makes contouring with the scalp easier and provides powerful and focused stimulation [22].

A trained physiatrist gave TMS at the left M1. The surface EMG electrodes were placed on the right abductor pollicis brevis (APB) and the right extensor digitorum brevis (EDB) muscles, respectively. We searched for the motor threshold (MT) which indicated the minimum intensity of the stimulation that induced an MEP greater than or equal to 50 µV for 5 out of 10 stimulations (a 50% successive trial) [4, 9].

The landmark for stimulation was C3 (the left M1). The hand motor areas were always on the left side of the leg areas, which were likely close to or at the vertex. We divided half the line, which measured from Nasion (Ns) to Inion (In). Then, we divided half the line that was measured from both tragi to find the vertex. The C3 hand motor area was 5 cm to the left of the vertex [4, 5, 27].

Copyright and License information: The Author(s) ©2022
Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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